Exhaust-muffler.



Patented Mar. 12, 1912.

G. F. SWAIN.

EXHAUST MUFPLBR.

APPLICATION FILED APR.6, 1910.

"Ill,

GEORGE F. SWAIN, F GHICAGO, ILLINOIS.

Specification of Letters Patent.

Patented Mar. 12, 1912'.

Application filed April 6, 1910. Serial No. 553,689.

`To all 'whom it may concern:

Beit known that I, GEORGE F. SWAIN,

Y citizen of the United States, residing at Chicago, in the county ofCook and State of Illinois, have invented a certain new and usefulImprovement in Exhaust-Mufflers, of

- which the following is a full, clear, concise,

and exact description.

My invention relates to exhaust muiilers for internal combustionengines.

The object ofmy invention is to provide a muffler of simpleconstruction, which can be readily assembled or taken apart, which ischeap to manufacture, and which will so diffuse the exhaust gasest-hatthe finalescape thereof in the atmosphere will be free from thedisagreeable noise incident to a free exhaust of the gases.

VMy invention consists of a casing provid-I ing a chamber for confiningthe exhaust gas, a series of diaphragms or'bailles, preferablycup-shaped and resting one on top of the other, fitting Within saidchamber transversely thereof, said diaphragms being provided withopenings or perforations surrounded by tlanges. Said diaphragms arepreferably provided in alternation with apertures near their peripheriesand at or near their centers to provide a tortuous passage for the gasthrough said chamber. yThe casing is provided with a cap or cover havingan inlet and an outlet opening, respectively, Said covers being heldinposition in some suitable4 manneras for example, by av rod which extendscentrally through the diaphragms in the casing and which is threaded atone of i ts ends into the cover and which is provided at its oppositeend with threads for receiving a. clampingnut.

One feature of my invention consists in f the structure of thediaphragms or baiiies,

said batlles being provided with anges surrounding the openings throughwhich the exhaust gas fiows.

The several features of my invention may be more readily understood byreference to the accompanying dra-wings in which,

Figure 1 is a central, longitudinal section of the muffler; Figs. 2 and3 are a central, vertical section and a plan view, respectively, of oneof the alternating series of diaphragme; and Figs. 4 and` 5 are acentral, vertical section and plan view, respectively, of the otheralternating series ofdiaphragms'.

Similar letters of reference indicate like' part-s throughout theseveral views.

The main body 1 of the casing of the chamber which receives the exhaustgas may be of the usual construction. Fitting within and transversely ofsaid casing are a series of diaphragme 2 and 3, respectively, which 'areshown as cup-shaped, the flanges 4 of one cup fitting against theinternal wall-of the casing 1 and resting upon the bottom of thepreceding cup, thus spacing said diaphragms at suitable distances apart.of the diaphragms 3 is provided at or nea-r it-s center with an openingfor the passage of the gases, preferably with a single large opening 5.Each of the diaphragms 2 is provided near its periphery with a series ofsmaller apertures 6. The cup-shaped diaphragms 2 andy 3 are drawn intosuit-able shape from sheet metal, and upon the interior of the cupsabout the openings 5 and 6 are provided flanges or short tubes 7 and 8,respectively.

The ends of the casing 1 are closed by caps or covers 9 and 10,respectively, which may have annular grooves about their periphery forreceiving the ends of the casing.

Each

The covers 9 and 10 have flanges which prodesired manner, but Ipreferably employ a rod 11 which extends longitudinally and axially ofthe casing through the openings 5 in the cups 3 and through centralperforations 12 in the cups 2. The\ends of the rodl 11 project throughthe covers 9 and 10 and are screw threaded. The rod 11 is threaded inone of the covers 9, and receives a clamping nut 13 upon its oppositeend. The covers are thus securely locked in place, and the cups 2 and 3are suitably spaced apart and are held against displacement.

The cover 9 is provided, preferably near its periphery, with an inletopening 14 for exhaust gases from the engine and the cover 10 islikewise provided with outlet opening 15 through which the gases escapefrom the muffler. The inlet opening 14 is preferably p of the same sizeas the central opening 5 of the diaphragm 3, and the sum total of theapertures 6 of each of the diaphragme 2 are anges likewise equivalent tothe opening 5 of each of the diaphragms 3.

As shown, thef openings 5 and 6 in the diaphragm are relatively soarranged as to provide atortuous path for the exhaust gas and thus toprevent a iioW of gases in a direct ath through the mutiier, and the and8 about the said openings still further diffuse the gases Without anyappreciable back pressure. As a result of the structure, the gasesescape from the muiiier unaccompanied by disagreeable noises and Withoutinterfering with the proper exhaust from the internal combustion engineto which the mu'lier is attached.

Having thus described my invention, what I claim is:

l. In an exhaust-muffler for internal combustion engines, thecombination With a chamber for confining the exhaustgas, said chamberhaving an inlet and an outlet port, of a series of diaphragms fittingWithin said chamber transversely of the same, said diaphragms beingprovided alternately with a single large, central opening and with aplurality 4of smaller peripheral openings for the passage of the'exhaust gas, said diaphragms being provided with open-ended .angessurrounding said openings ,on the inlet side of sai-d diaphragms.

2. In'an eXhaust-'mufier for internal combustion engines, thecombination With -a chamber for confining the exhaust-gas, said chamberhaving an inlet and an outlet port, of a series of diaphragms ittingWithin said chamber transversely of .the sa1ne,'said diaphragms beingprovided alternately with openings near their peripheries land theircenters for the passage of the exhaust gas, said diaphragms beingprovided with openended flanges surrounding said openingson the inletside of said diaphragms.

3. In an exhaust-mulli'er for internal combustion engines, thecombination with a chamber for confining the exhaust-gas, said chamberhaving an inlet and an outlet port, of a series of cup-shaped diaphragmsfitting Within said chamber transversely of the same, the flanges ofsaid diaphragms serving as spacing members for the diaphragms, and saiddiaphragms being provided with openings disposed so as to providev atortuous path through said chamber for the exhaust-gas, said diaphragmsbeing provided With open-ended ianges surrounding said openings on theinlet side of said diaj phragms.

In Witness whereof, I .hereunto subscribe my name this thirty-iirst dayof March A. D.

GEORGE F. SWAIN.. Witnesses:

` GEO. C. DAvIsoN,

lMcCLnLrnrm YoUNc.

